LONDON — Vatican officials said late Tuesday that Pope Francis had developed pneumonia in both lungs, further complicating ...

The Vatican said Pope Francis’ respiratory infection also involves asthmatic bronchitis, which requires cortisone antibiotic ...

Viral infections such as colds and the flu, acid reflux and physical exercise may also exacerbate asthma symptoms.

Bronchitis occurs when the airways in the lung, known as the bronchial tubes, become inflamed, leading to coughing and mucus production. That infection can sometimes spread to the lungs ...